Pivot joint for expandable frame



FIG. 1 is a pivot joint for expandable frame in a perspective view;

FIG. 2 is a front view thereof, with the rear view being identical;

FIG. 3 is a right side view thereof, with the left side view being identical;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof; and,

FIG. 6 is a perspective view showing the pivot joint for expandable frame positioned on a frame.

The broken lines are included for the purpose of illustrating portions of the pivot joint for expandable frame that form no part of the claimed design. 

CLAIM The ornamental design for a pivot joint for expandable frame, as shown and described. 